The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 10
... satellites , only about half an inch across . Outwards from Mars is a great gulf , empty save for thousands of minor planets or " asteroids " , few of which on this scale are much larger than grains of sand . We have to travel 483 miles ...
... satellites , only about half an inch across . Outwards from Mars is a great gulf , empty save for thousands of minor planets or " asteroids " , few of which on this scale are much larger than grains of sand . We have to travel 483 miles ...
Pagina 138
... satellites , being about 3,000 miles in diameter , but for some reason it has never been officially named and the " Nautical Almanac " , the arbiter in such matters , always refers to it long - windedly as " the satellite of Neptune ...
... satellites , being about 3,000 miles in diameter , but for some reason it has never been officially named and the " Nautical Almanac " , the arbiter in such matters , always refers to it long - windedly as " the satellite of Neptune ...
Pagina 160
... satellite would continue to circle the Earth for ever with clockwork precision , this is not perfectly correct . The disturbing effect of the Sun and Moon , and the attraction of the Earth's own equatorial bulge , would slowly alter the ...
... satellite would continue to circle the Earth for ever with clockwork precision , this is not perfectly correct . The disturbing effect of the Sun and Moon , and the attraction of the Earth's own equatorial bulge , would slowly alter the ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
Automatic Rocket Surveying Mars | 4 |
THE EARTH AND ITS NEIGHBOURS | 9 |
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acceleration already astronautics astronomers atmosphere atomic rockets body bricks British Astronomical Association build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust trolley Uranus voyage weight